Spiral separator



F. PARDEE SPIRAL SEPARATOR Filed Oct July24, 1923.

o Il

duly 2d. i923,

FRANK PARERE, OF HZLETGN. PENNSEL'VANA., ASSGIT' SEER SEP

LT OR.

Application led October l0, No. 5065755.

To all "LU/720m it muy concern:

Be it known that L llnnnn Pannen, a citizen oit the United States, and resident of Hazleton, lennsylvania, have invented certain new and usei'ul linproveinents in Spiral Seoarators. of which the 'following is a specihcation.

r his invention relates to spiral separators particularly to point-s of construction whereby the flare or downward pitch may be increased or decreased as desired, and to ineansfor cont-rolling the elevation to which the material niust cliinb before it can fly or skira ofi the runway. y

The invention is illustrated in the accoinpanying drawings iny which Fig. l is a side elevation of a portion ot trie separator with parts shown in section to clearly illustrate Vthe present unproveincnt; v-

l `ig1 2 is afraginentary plan on a larger scale of parts shown in Fig. l;

Fig. 3 is an enlarged sectional view.

lnithe drawings l represents the usual cen ral supporting` post, 2 the outwardly ant upwardly extending supporting rods to which are secured the fixed segments: or jackets 3 of the runway. The jackets 3 are substantially triangular in shape and overlap one another at their radial edges so as to forni a continuous spiral floor or runway. This runway is of known construction and is built at a fixed pitch or downward and inward inclination as illustrated in Fig. 3, the angle of inward inclination being governed according At-o the class of material to be handled by the separator.

To the runway 3 l secure a series of pitch reducing plates l by nieans of rivets 5. The plates follow the general outline of the spiral runway but their inner ends 6 are raised so as to leave'a space 7 between theinselves and the floor or runway 3, thus these pitch ,reducing plates have a incre gentle downward inclination or pitch than the fixed plates 3 of the runway. At the outer or peripheral edge of the runway l secure series of plates 8 forming a continuous flange adapted to prevent material from creeping up and flying off the outer portion of the separator. To the outer face of the plates 8 l adiustably secure other plates 9 by means of clamp bolts 10 which pass throrgh slots ll forined in plats t?. suitable s 'l2 be ,ig carried by the bolts l0 to clainp tes 9 at the desired elevation.

plat l his construction permits a separator havin f.y listed pitch 0r downnfard inclination to be constructed so that the outer portion thereof will have a niore gentle pitch and thereby tend to hold the purer coal in the l The plates may be perforated e roughened to increase the frictonal efl ct on the ina arial traveling theresuch i'rictional surface being indicated at in Fig. 2. fill the plates Ll-l niay be provided with such frictional surfaces or alternate plates can be so arranged accorde to the requirements of the particular cl of coal being handled.

.he structure herein illustrated is particul.. v adaptefll for handling coal or other materials of sulistantiallyv round :fractures which gather considerable nioinentuin trai# elf `j on the seoarator and. which are not as easily governed other classes ot coal. rlie outer flanged inenibcrs 8 are effective to prevent the coal from fig. 'ng off the runway at a high velocity and the adjustable plates 9 provide ineans whereby the height at which the coal is permitted t@ skini off the runway can be controlled, it being apparent that raising or lowering the plates 9 the distance which the coal has to `cliinb can be readily varied so as to make it incre or less difficult for the purer coal to skim or fly ofl'1 the outer portion of the runway. The purer coal vwhich is skinnned or flies off the outer' portion of the runway is caught by an outer conveyor thread i3 ha 7indian upwardly flared flange lelof suflihient height to catch all ofv the material discharged freni the separator thread. rlhis conveyor thread is of known construction and is supported in the usual manner by radial rodsl-' secured to the central post. it the lower end 16 the conveyor thread connects with discharge chute, not shown. leading to a suitable storage bin. it the lower end of the separator are mounted chutes 17 and 18 adapted to receive respectively the pure coal which flows along that portion of the runway formed by the plates a. and the slate and other refuse which flows along the inner portion of the runway which is made up of the fixed plates 3. rlhese Sil purities I and cause them to more gradually inwardv s triction .that the purer coal is ot a more smooth and glossy surface than the slate and other impurities and that `it :hows more freely over inclined surfaces. ln operation the mixture ot pure coal` slate and other impurities is 'fed to the outer portion oit `gentle pitch at the upper end ot the separator and as the material travels downwardly the purer coal separates fl'rom the slate and ,impurities and travels in an outer path, the surfaces on the plates l and the characteristics of the slate and im tendini;r to retard their movement natural and linally fall oli on to the inner portion ot the runway formed by the plates 3 Those lumos oli coal which are oitl a purer grade travel at a considerably higher rate ot speed than the other lumps and gradually climb up the flanges 8 and plates 9 and are caught bythe conveyor thread ll. The

intermediate Lstrade ot pure coaltravels along` the portion of the runway formed by the plates Lland is discharged through chute 17 to a suitable storage bin and the slate, boney coal and other impurities are discharged through chute 18 to a suitable refuse pile. ,any lumps ot slate or other impurities travellinn' slowly enough to tall over the edge 6- ot the plates will not have suilicient momentum when reaching the runway 3 to tend to carry them outward and under the plates 4l, ln 'fact such lumps will tend to travel inward toward the cent-ral post l due to the steeper pitch or inward inclination ot the runway 3.

While I have described with `great particularity the embodiment ot the invention herein illustrated, it is not to be construed that Iain limited thereto and it is'to be understood that the illustrations and the foregoingv description are to be interpreted in an illustrative rather than a limiting sense, as various modifications may be made without departing from the Scope of the invention as delined in the appended claims.

What l claim is:

l. A spiral separator having` a runway comprising` a series oi? inwardly and downwardly inclined segmental plates and series of plates secured to the outer portion ot said segmental plates having their inner ends spaced above the surii'ace thereo't to form an outer runway of less inward innaeaeie clination than the inclination of the iirst mentioned `segmental plates.

2515i spiral separatorl having a runway comprising` series of inwardly and downwardly inclined segmental plates, upwardly extending" flanged platesv secured to said segmental plates and means carried thereby lor adjusting` the height of said flange so as to control the elevation at which the material will be permitted to skim oil' ot the separator. I

.A spiral separator having' a runway comprising a series ot inwardly and downwardly inclined segmental plates and a series ot plates secured to the outer portion oli said segmental plates having their inner ends spaced above the surface thereof to `term an outer runway ot less inward inclination than the inclination ot the first mentioned segmental plates and means associated therewith :t'or varying` the distance which material must climb in order to skim elliot the runway.

Ll. A spiral separator comprising a central supporting post7 a series oi outwardly and upwardly extending supporting rods carried therebya xed segmental plates secured to said supporting rods, a series ot outer arcuate plates carried by said lined segmental plates and having their inner enc s spaced above the surface thereof so that theyare inclined to a lesser inward anule than said fixed segmental plates7 an outer upwardly extending' dange secured to said segmental plates and means secured to said Flange tor varying` the effective heightthereot,

5. A spiral separator having` a runway over which the materials to' be separated traveh the inner and outer portions ofsaid runway being' inclined inwardly and 'downwardly at different angles.

G. A spiral separator comprising a runway over which the materials to be separated travel, 'said runway having an inner portion inclined inwardly and downwardly at a comparatively steep angle and an outer portion also inclined inwardly and downwardly but at a more gentle angle than said inner portion the portions of the runway being;` so arranged that certain classes of material can travel fronithe outer portion to the inner portion. f A

ln witness whereof, l have hereunto signed my name.

FRANK PARDEE. 

